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<Title>Spline Line Chart</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Spline Line Chart</p>
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<img src="images/splineline.png" width='600' height='300'>
<br><br>
This example demonstrates using spline curves to join data points, title with soft lighting effect, as well as a number of chart formatting techniques.<br><br>
<ul><li> Add a spline layer to the chart using <a href="XYChart.addSplineLayer.htm">XYChart.addSplineLayer</a>.<br><br>
<li> Set the shapes, sizes and colors of the data symbols using <a href="DataSet.setDataSymbol.htm">DataSet.setDataSymbol</a>.<br><br>
<li> The soft lighting effect of the title is defined using <a href="Chart.softLighting.htm">Chart.softLighting</a>, then applied to the title using <a href="Box.setBackground.htm">Box.setBackground</a> of the title <a href="TextBox.htm">TextBox</a> object.<br><br>
<li> Set the background, border and grid colors of the plot area using <a href="XYChart.setPlotArea.htm">XYChart.setPlotArea</a>.<br><br>
<li> Control the line width of the axes using <a href="Axis.setWidth.htm">Axis.setWidth</a>.<br><br>
<li> Include icon images in chart and axis titles using <a href="cdml.htm">CDML</a>.<br><br>
<li> Add a logo at the bottom right corner of the plot area as custom text using <a href="BaseChart.addText.htm">BaseChart.addText</a> with <a href="Chart.BottomRight.htm">BottomRight</a> alignment. The logo includes images and text encoded using <a href="cdml.htm">CDML</a>.</ul>
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/splineline.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// The data for the chart
double[] data0 = {32, 39, 23, 28, 41, 38, 26, 35, 29};
double[] data1 = {50, 55, 47, 34, 47, 53, 38, 40, 51};

// The labels for the chart
String[] labels = {"0", "1", "2", "3", "4", "5", "6", "7", "8"};

// Create a XYChart object of size 600 x 300 pixels, with a pale red (ffdddd) background, black
// border, 1 pixel 3D border effect and rounded corners.
XYChart c = new XYChart(600, 300, 0xffdddd, 0x000000, 1);
c.setRoundedFrame();

//Set search path to current JSP directory for loading icon images
c.setSearchPath(getServletConfig().getServletContext(), request);

// Set the plotarea at (55, 58) and of size 520 x 195 pixels, with white (ffffff) background. Set
// horizontal and vertical grid lines to grey (cccccc).
c.setPlotArea(55, 58, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);

// Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial Bold font.
// Set the background and border color to Transparent.
c.addLegend(55, 32, false, "Arial Bold", 9).setBackground(Chart.Transparent);

// Add a title box to the chart using 15pt Times Bold Italic font. The title is in CDML and includes
// embedded images for highlight. The text is white (ffffff) on a dark red (880000) background, with
// soft lighting effect from the right side.
c.addTitle(
    "&lt;*block,valign=absmiddle*&gt;&lt;*img=star.png*&gt;&lt;*img=star.png*&gt; Performance Enhancer " +
    "&lt;*img=star.png*&gt;&lt;*img=star.png*&gt;&lt;*/*&gt;", "Times New Roman Bold Italic", 15, 0xffffff
    ).setBackground(0x880000, -1, Chart.softLighting(Chart.Right));

// Add a title to the y axis
c.yAxis().setTitle("Energy Concentration (KJ per liter)");

// Set the labels on the x axis
c.xAxis().setLabels(labels);

// Add a title to the x axis using CMDL
c.xAxis().setTitle("&lt;*block,valign=absmiddle*&gt;&lt;*img=clock.png*&gt;  Elapsed Time (hour)&lt;*/*&gt;");

// Set the axes width to 2 pixels
c.xAxis().setWidth(2);
c.yAxis().setWidth(2);

// Add a spline layer to the chart
SplineLayer layer = c.addSplineLayer();

// Set the default line width to 2 pixels
layer.setLineWidth(2);

// Add a data set to the spline layer, using blue (0000c0) as the line color, with yellow (ffff00)
// circle symbols.
layer.addDataSet(data1, 0x0000c0, "Target Group").setDataSymbol(Chart.CircleSymbol, 9, 0xffff00);

// Add a data set to the spline layer, using brown (982810) as the line color, with pink (f040f0)
// diamond symbols.
layer.addDataSet(data0, 0x982810, "Control Group").setDataSymbol(Chart.DiamondSymbol, 11, 0xf040f0);

// Add a custom CDML text at the bottom right of the plot area as the logo
c.addText(575, 250,
    "&lt;*block,valign=absmiddle*&gt;&lt;*img=small_molecule.png*&gt; &lt;*block*&gt;&lt;*font=Times New Roman Bold " +
    "Italic,size=10,color=804040*&gt;Molecular\nEngineering&lt;*/*&gt;").setAlignment(Chart.BottomRight);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "",
    "title='{dataSetName} at t = {xLabel} hour: {value} KJ/liter'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Spline Line Chart&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Spline Line Chart
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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